New ruthenium complexes in the catalytic hydrogenation of alkynes. Study of structure and mechanism

Youval Shvo, Israel Goldberg, Dorotha Czerkie, Dvora Reshef, Zafra Stein

Research output: Contribution to journalArticlepeer-review

Abstract

The reaction of [(η5-Ph4C4COHOCC4Ph 45)(μ-H)[(CO)4Ru2] (1) with several alkynes was studied. Two new types of Ru complexes, [(η5-Ph4C4CO)(CO)2RuC(Ph)=CPh] (6) and[(η5-Ph4C4COH)(CO)2 RuC(CO2Me)=CHCO2Me] (7), were isolated and structurally characterized by single-crystal X-ray crystallography. These complexes were found to be implicated in the hydrogenation of alkynes with 1 as a catalyst precursor. While complex 7 was found to function as a catalyst in the hydrogenation cycle, complex 6 acts as a catalysis poison by virtue of its stability and irreversible formation. A catalytic cycle has been proposed.

Original languageEnglish
Pages (from-to)133-138
Number of pages6
JournalOrganometallics
Volume16
Issue number1
DOIs
StatePublished - 7 Jan 1997

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